................need help with a 4.7...........

When I worked at the transmission shop, every now and then, we used a Jasper reman transmission. I remember the Jasper rep shootin the breeze one day and we got on the subject of the 4.7. He said they are BAD about sludging up the oil. He said they found that the oil pump pickup tube is too small and that on all their reman 4.7s they replace the stock one with a larger tube. As you can imagine, sludge can be responsible for all kinda maladies.